If two points are at the same potential, does this mean that no work is done in moving a test charge from one point to the other? does this imply that no force must be exerted? explain 15)how much work does the electric field do in moving a proton from a point with a potential of +175v to apoint where it is -65v? 16) the electric field between two parallel plates connected to a 55-v battery is 1600 vim. how far apart are the plates? 17) what is the magnitude of the electric field between two parallel plates 3.0mm apart if the potential difference between them is 120 v?

45 is the correct answer

Planck decided to assume that atoms could only vibrate at certain frequencies that were whole numbers eg 2f, 3f and so on. others used to think that atoms vibrate continuously

Let  be the velocity of the plane.let  be the velocity of the wind.let  be the resultant velocity.add the velocities to find the resultant velocity. in the attached picture, i have done the tail-to-tip method: draw one of the vectors, then add the end of the other vector to the tip of the first drawn vector.see diagram.the magnitude of  can be found via the pythagorean theorem as this is a right angle triangle.to find  , use inverse tangent: since  is in the direction "east of north", a quick convert to "north of east " reveals that 90 - 7.06 = 82.94 = 83.so our resultant is 529 m/s [83° n of e]the answer is a.